Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 57, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 23, 2012, 12:18 PM PDT for San Bernardino County, California. It was in force for 117 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 23, 2012, 12:18 PM PDT (19:18 UTC)
- Expired
- Jul 23, 2012, 2:15 PM PDT
- In force
- 117 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 78 km from the middle of the area, began a volume at 19:20 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 23, 12:45 PM PDT | FLASH FLOOD | 14 Nw Mountain Pass, CA | TIME OF OCCURRENCE WAS ESTIMATED BY RADAR. OBSERVED SIGNFICANT DEBRIS FLOW OVER KINGSTON RD ONE HALF MILE NORTH OF THE EXCELSIOR MINE FORK DURING STORM SURVEY AT 250 PM. THE ROAD WAS IMPASSABLE. SEVERAL LOCATIONS...8 TO 9 MILES NORTH OF INTERSTATE 15 ALONG EXC |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 7.3 hours before the alert went out and 85 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 177 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 2252 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- -22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
228 WGUS55 KVEF 231918 FFWVEF CAC071-232115- /O.NEW.KVEF.FF.W.0057.120723T1918Z-120723T2115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1218 PM PDT MON JUL 23 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEAST SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 215 PM PDT. * AT 1215 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM OVER NORTHEAST SAN BERNARDINO COUNTY...OR 19 MILES WEST OF PRIMM. THE STORM PRODUCING FLASH FLOODING WAS NEARLY STATIONARY. * LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF NORTHERN SAN BERNARDINO COUNTY INCLUDING KINGSTON AND EXCELSIOR MINE ROAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3547 11587 3579 11594 3580 11564 3564 11546 $$ JH
2 follow-up statements
768 WGUS75 KVEF 232017 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 117 PM PDT MON JUL 23 2012 CAC071-232115- /O.CON.KVEF.FF.W.0057.000000T0000Z-120723T2115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 117 PM PDT MON JUL 23 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM PDT FOR NORTHEAST SAN BERNARDINO COUNTY... AT 111 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THUNDERSTORMS HAD DIMINISHED OR MOVED OUT OF THE WARNING AREA. HOWEVER...RUNOFF FROM HEAVY RAIN EARLIER WILL STILL LIKELY CAUSE FLASH FLOODING. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF NORTHEAST SAN BERNARDINO COUNTY INCLUDING KINGSTON AND EXCELSIOR MINE ROAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3547 11587 3579 11594 3580 11564 3564 11546 $$ JH
725 WGUS75 KVEF 232108 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 208 PM PDT MON JUL 23 2012 CAC071-232117- /O.EXP.KVEF.FF.W.0057.000000T0000Z-120723T2115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SAN BERNARDINO CA- 208 PM PDT MON JUL 23 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 215 PM PDT FOR NORTH CENTRAL SAN BERNARDINO COUNTY... RAINFALL ENDED IN EXTREME NORTHEAST SAN BERNARDINO COUNTY NORTH OF INTERSTATE 15 AND THE THREAT OF FLOODING HAS ENDING. ANY FLOODING FROM EARLIER RUNOFF WILL BE DIMINISHING. LAT...LON 3547 11587 3579 11594 3580 11564 3564 11546 $$ JH
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 11:17 AM PDT | Areal Flood Advisory | VEF | Inyo | 49 min |
| Jul 23, 11:47 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 23, 12:05 PM PDT | Flash Flood Warning | VEF | Inyo | 115 min |
| Jul 23, 12:12 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 48 min |
| Jul 23, 1:54 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 66 min |
Nearby
Flash Flood Warnings in California, 2012Every flash flood warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.